CAJ | 학술논문

煤粉料仓下料是气流床粉煤气化工艺中粉体供料单元的重要组成部分，其安全稳定运行具有重大的经济意义。提出将电容层析成像(ECT)技术用于煤粉料仓下料，从而实现研究手段的可视化。在煤粉料仓下料系统上，通过线性反投影算法及图片累加技术，获得料仓出口管道截面的相对颗粒浓度分布图像和下料过程的二维流型图；对比分析了称重信号和ECT信号的时间序列曲线，并通过RSD统计方法定量描述煤粉下料的波动程度。结果表明，ECT研究与煤粉下料分区理论吻合良好，借助ECT可充分认识煤粉下料流型和气固作用特征。
매분료창하료시기류상분매기화공예중분체공료단원적중요조성부분，기안전은정운행구유중대적경제의의。제출장전용층석성상(ECT)기술용우매분료창하료，종이실현연구수단적가시화。재매분료창하료계통상，통과선성반투영산법급도편루가기술，획득료창출구관도절면적상대과립농도분포도상화하료과정적이유류형도；대비분석료칭중신호화ECT신호적시간서렬곡선，병통과RSD통계방법정량묘술매분하료적파동정도。결과표명，ECT연구여매분하료분구이론문합량호，차조ECT가충분인식매분하료류형화기고작용특정。
Hopper discharge is one of the most important components in the entrained-flow gasification technology of pulverized coal. The safety and stabilization of hopper discharge are of great economic significance. In this paper, electrical capacitance tomography (ECT) was used to realize the visualization of pulverized coal discharge. The ECT images were reconstructed using linear back projection (LBP) algorithm and accumulated to obtain the relative particle concentration distribution and two-dimensional images of flow pattern. Furthermore, the weighing signal and ECT signal were analyzed and compared. Finally, statistical method of RSD was used to describe the fluctuation of hopper discharge. It showed that the research results of ECT agreed well with divisional discharging theory, which confirmed the feasibility of ECT application to the hopper discharge of pulverized coal.